题目

中国人很早就在生产活动中发现了圆周率问题;南北朝数学家祖冲之经过反复演算,把圆周率精确到小数点后7位;近年来,人们借助计算机把圆周率精确到了难以想象的10万亿位。这说明 ①人类的认识能力是无限发展的        ②实践是人类认识得以最终完成的强大动力 ③认识随着实践的发展而不断深化      ④新的认识是在推翻原有认识的基础上发展的 A.①③            B.②③           C.①④           D.②④按要求完成句子。1. There were some black clouds in the sky.(改为否定句)There ______ ______ ______ _____ in the sky.2. He wore a lot of bottles.(改为一般疑问句)________ he __________ a lot of bottles?3. Mike bought some oranges on the farm.(对划线部分提问)_______ ______ Mike ________ on the farm?4. I called you because I wanted to visit you. (对划线部分提问)______ _______ you call _____ ?5. My holiday was great fun.(对划线部分提问)______ _____ ______ holiday?
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